How to clear TextField focus when closing the keyboard and prevent two back presses needed to exit app in Jetpack Compose?

by

There’s a compose issue with focused text field prevents back button from dismissing the app when keyboard is hidden. It’s marked as fixed, but will be included in some future release, not in 1.0

But, as I understand, the fact that text field is not loosing focus after keyboard being dismissed, is intended behaviour on Android(because of possible connected keyboard? I didn’t get the reason). And this is how it works in old android layout too

It seems strange to me, so I came with the following modifier which resigns focus when keyboard disappears:

fun Modifier.clearFocusOnKeyboardDismiss(): Modifier = composed {
    var isFocused by remember { mutableStateOf(false) }
    var keyboardAppearedSinceLastFocused by remember { mutableStateOf(false) }
    if (isFocused) {
        val imeIsVisible = WindowInsets.isImeVisible
        val focusManager = LocalFocusManager.current
        LaunchedEffect(imeIsVisible) {
            if (imeIsVisible) {
                keyboardAppearedSinceLastFocused = true
            } else if (keyboardAppearedSinceLastFocused) {
                focusManager.clearFocus()
            }
        }
    }
    onFocusEvent {
        if (isFocused != it.isFocused) {
            isFocused = it.isFocused
            if (isFocused) {
                keyboardAppearedSinceLastFocused = false
            }
        }
    }
}

Usage:

BasicTextField(
    value = valueState.value,
    onValueChange = {
        valueState.value = it
    },
    modifier = Modifier
        .clearFocusOnKeyboardDismiss()
)

More Related Contents:

  1. Jetpack Compose Text hyperlink some section of the text
  2. Why a new ViewModel is created in each Compose Navigation route?
  3. Why the view keeps flashing when using jetpack navigation with Compose?
  4. How are Android activities handled with Jetpack Compose and Compose Navigation?
  5. How to get activity in compose
  6. How to handle one-shot operations in Jetpack Compose?
  7. Pass Parcelable argument with compose navigation
  8. Jetpack Compose collapsing toolbar
  9. Jetpack Compose how does SubcomposeLayout work?
  10. Jetpack Compose Smart Recomposition
  11. How can I get onTouchEvent in Jetpack Compose?
  12. Android Jetpack Compose width / height / size modifier vs requiredWidth / requiredHeight / requiredSize
  13. Is there a way to increase a Composable size by chaining with another Modifier?
  14. How to get exact size without recomposition?
  15. Content padding parameter it is not used
  16. Scoping States in Jetpack Compose
  17. Different types of width in jetpack compose
  18. Jetpack compose – how do I refresh a screen when app returns to foreground
  19. Jetpack Compose lazy column all items recomposes when a single item update
  20. Error when adding buildFeatures in build.gradle file
  21. ViewTreeLifecycleOwner not found from DecorView@2da7146[MyActivity]
  22. Passing URL as a parameter to Jetpack Compose Navigation
  23. How to achieve a staggered grid layout using Jetpack compose?
  24. How to disable and enable scrolling in LazyColumn/LazyRow in Jetpack Compose?
  25. How to show animate an item view in LazyColumn on Jetpack Compose Android
  26. fillMaxSize modifier not working when combined with VerticalScroll in Jetpack Compose
  27. How to pass id and application to a viewModel/viewModelFactory in Jetpack Compose?
  28. Jetpack Compose Navigation loads screen infinitely
  29. Show custom alert dialog in Jetpack Compose
  30. What does Jetpack Compose remember actually do, how does it work under the hood?

Leave a Comment